Yeah at first I thought the TT was wrong til I saw the same thing on the scan tool. Just seems like when I used to be into stereos voltage was in the 14s. Pretty much all of todays amplifiers are rated at 14.4 volts...
Can I get at least one other person who is running this same voltage to speak up, please? Preferably someone straining their fuel system with a big turbo or maybe EMS or something. For some reason I am running outta fuel with a DCR Walbro 255 with the bypass mod, 750s, a return line and only a 50 trim. I figured it might be the voltage.
My voltage is always at 14.2 or 14.4. I have the big 3 done and a yellow top up front if that helps at all. I'm also running a 3500 watt stereo and the only time I see it drop that low is when I'm running everything a full tilt. I wouldn't say your voltage is bad though.
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"One machine can do the work of fifty ordinary men, but no machine can do the work of one extraordinary man"
My voltage is always at 14.2 or 14.4. I have the big 3 done and a yellow top up front if that helps at all. I'm also running a 3500 watt stereo and the only time I see it drop that low is when I'm running everything a full tilt. I wouldn't say your voltage is bad though.
I might have to update my ground and shit and see if that helps. I actually wanted to go to a smaller battery though or relocate it to the trunk. Both of which will probably lower the voltage more.
I might have to update my ground and shit and see if that helps. I actually wanted to go to a smaller battery though or relocate it to the trunk. Both of which will probably lower the voltage more.
Anywhere between 13.1-14.7V is fine. The ecu will vary the voltage a bit with battery temperature and load.*1
imo, A good refference for this type of info is the Factory Service manual, and not random know-nothin chuckle heads on the internet.
*1: page 8F-20 in service manual
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Quote: Originally Posted by Bell Intercoolers
Regardless of the [Thermal] efficiency, if too much pressure is lost, then the intercooler is either useless or can actually decrease performance...Corky Bell
My car has always ran around 13.3-13.7. I have DCR Walbro, bottle neck mod, return line, stg 2's and Dtec. But I have plenty of fuel with my 50trim. Even on 21psi. I have crane 14's also along with DCR ported intake mani and t/b.
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Thanks but doesn't it seem like the fuel pump could vary it's pressure a good bit in that wide range of 13.1 to 14.7?
Not pressure really, its fuel volume that changes with voltage(mass flow rate actually.) If there's sufficient volume, pressure is unchange regardless of voltage input.
Supposedly voltage drops a bit by the time it gets back to the pump. I haven't independantly varified this, but it sounds reasonable. Some vendors sell relay kits to supply the STOCK pump a more consistant voltage. imo a bit lower voltage to a 255lph pump is not much of a concern on a stock turbo car
Hmm, both Nemiro and the guy that was tuning my SCT say I am running outta fuel with the 50 trim on 24PSI. Mods are the 50, ported head, ported tb and intake mani and crane 16s. I thought I would have plenty with the 750CC injectors, return line, and walbro 255 with the bottleneck mod. PTP claims the fuel pump only gets 10 volts and it drops to 8 volts at 4800 RPMs. I could see the fuel pressure drop on my fuel pressure regulator when my car hit around 5200RPMs. It would drop around 5 PSI.
I've had enough fuel for around 30psi without meth on my last engine (AMS) on 750's, returnline, bottle neck mod, and DCR pump. That was with crane 16's and non-ported intake mani, t/b or head.
Do you have your rising rate regulators boost source tapped into the vacuum liine coming directly off the compressor housing, before the MBC/EBC? I had a fuel issue that plagued me for months and that was the problem.
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What's normal voltage?
Linear Mode
